| 摘要 |
<p>A displacement adjusting system for a variable displacement pump utilizes a pair of bleed circuits connected as a hydraulic bridge to control the servomotor of the pump so as to maintain a balance between the pressure levels generated in the command bleed circuit and in the feedback bleed circuit. The adjustable restriction in the feedback circuit is of the laminar flow type, its length being adjusted with changes in pump displacement. Input torque is limited by a relief valve acting on the control pressure in the command circuit. Pump outlet pressure is limited by a valve which disables the bleed circuits. The system is applicable to both one-way and reversible displacement pumps.</p> |
